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fix(esm): hash whether a module's exports are values or getters - #22644

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alexander-akait merged 2 commits into
webpack:mainfrom
aryanraj45:fix/require-cycle-exports
Oct 12, 2026
Merged

alexander-akait merged 2 commits into
webpack:mainfrom
aryanraj45:fix/require-cycle-exports

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@aryanraj45

@aryanraj45 aryanraj45 commented Oct 12, 2026 •

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Summary

Found by the rebuild fuzzer. An export const or export default is defined as a value unless its module is in a cycle, which CircularModulesPlugin decides after the module is built, and nothing put that decision in a hash. So when an edit to another file formed or broke a require() cycle around a module, watch kept the old form:

// a.js: import b from "./b.js"; export const value = 1; …
// edit b.js to: exports.keys = Object.keys(require("./a.js"));
before: b.keys → ["keys"]          after: ["keys", "value"]   (fresh build: ["keys", "value"])

Each export now adds the decision to the hash where it makes it. Over 4 shapes × 2 modes × concatenation on and off × the cycle forming and breaking, main fails 8 of 32 and this change 0; hashing time is unchanged.

What kind of change does this PR introduce?

fix

Did you add tests for your changes?

Yes: watchCases/cache/cycle-binding-form (export const and export default, memory and filesystem cache); removing either hash fails it.

Does this PR introduce a breaking change?

No

If relevant, what needs to be documented once your changes are merged or what have you already documented?

n/a

Use of AI

I used Claude Code to find the bug with a rebuild fuzzer, write the fix and the tests. I reviewed every change myself.

Summary by CodeRabbit

  • Bug Fixes
    • Webpack now updates a module’s export bindings when a require() cycle forms or breaks, keeping exports accurate during rebuilds with memory or filesystem caching.

An `export const` or `export default` is defined as a value unless the module is in a cycle, which is decided after the module is built and was in no hash. So when another module's edit formed or broke a require() cycle around it, watch kept the old form: mid-cycle, the module showed none of those exports. Hash the decision where each export makes it.
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changeset-bot Bot commented Oct 12, 2026 •

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🦋 Changeset detected

Latest commit: 3c71e8e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package
Name Type
webpack Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

@github-actions github-actions Bot added the area: parser JavaScript parsing and dependency analysis (lib/javascript, lib/dependencies) label Oct 12, 2026
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Review in Change Stack →

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration
  • Configuration used: Repository: webpack/webpack/.coderabbit.yaml
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📥 Commits

Reviewing files that changed from the base of the PR and between 8b8905f and 3c71e8e.


📒 Files selected for processing (8)
  • test/watchCases/cache/cycle-binding-form/0/a.js
  • test/watchCases/cache/cycle-binding-form/0/b.js
  • test/watchCases/cache/cycle-binding-form/0/d.js
  • test/watchCases/cache/cycle-binding-form/0/index.js
  • test/watchCases/cache/cycle-binding-form/1/b.js
  • test/watchCases/cache/cycle-binding-form/1/d.js
  • test/watchCases/cache/cycle-binding-form/2/b.js
  • test/watchCases/cache/cycle-binding-form/2/d.js

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 7 remain after this review.



📝 Walkthrough

Walkthrough

ESM export dependency hashes now include a marker for the selected binding form, based on whether the parent module is circular. A new watch-cache case checks export keys across cycle states with memory and filesystem caches.

Changes

Cycle-sensitive export binding

Layer / File(s) Summary
Hash export binding form
lib/dependencies/esm/ESMExportExpressionDependency.js, lib/dependencies/esm/ESMExportSpecifierDependency.js, .changeset/023-cycle-export-binding-form.md
Both dependency types hash "value" when the parent module’s buildInfo.isCircular is exactly false, and "getter" otherwise. The specifier dependency does not update the hash when constValue is undefined.
Exercise cycle changes in watch cache
test/watchCases/cache/cycle-binding-form/*
The watch case adds modules that observe export keys during require cycles. Its assertions check export keys and expect observed keys only when WATCH_STEP === "1". The configuration runs production builds with memory and filesystem caches.

Possibly related PRs

  • webpack/webpack#21852: Changes cycle detection and const-export handling for ESM modules. This PR hashes the cycle-dependent export binding choice in the same ESM dependency types.

Priority: ➖ Normal

Change: Bug fix

Merge Risk: ⚪ Minimal · up to 3c71e

The change tracks cycle-dependent export bindings, and the watch case checks those transitions with memory and filesystem caches. No merge-blocking risk was identified; the PR is ready for normal checks.

Pre-merge checks | Passed 3 | Inconclusive 1

❌ Failed checks (1 inconclusive)

Check name Status Explanation Resolution
Title check Inconclusive The title uses the required Conventional Commit form, includes the allowed type fix, and accurately describes the export-binding hash change. The branch prefix is not provided, so type-to-branch-pre… Provide the branch name or confirm that its prefix is fix.
✅ Passed checks (3 passed)
Check name Status Explanation
Description Check Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Linked Issues check Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check Passed Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title uses the required Conventional Commit form, includes the allowed type fix, and accurately describes the export-binding hash change. The branch prefix is not provided, so type-to-branch-prefix matching cannot be verified.


  • Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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Reported by Types Coverage #1305 for 3c71e8e, computed by this pull request's own code.

Types Coverage

Coverage after merging fix/require-cycle-exports into main will be
97.28%
Coverage Report
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Without a cycle a module's getters come before its values in its keys, so the order shows a getter kept stale after the cycle broke, which the case did not check. It now starts with the cycle, breaks it, then forms it again.
@codecov

codecov Bot commented Oct 12, 2026 •

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.27%. Comparing base (fa15f02) to head (3c71e8e).

Additional details and impacted files
@@            Coverage Diff             @@
##             main   #22644      +/-   ##
==========================================
- Coverage   96.28%   96.27%   -0.01%     
==========================================
  Files         774      774              
  Lines      129982   129993      +11     
  Branches    43297    43302       +5     
==========================================
+ Hits       125149   125155       +6     
- Misses       4833     4838       +5     
Flag Coverage Δ
css-parsing 25.06% <0.00%> (-0.01%) ⬇️
html5lib 26.98% <0.00%> (-0.01%) ⬇️
integration 82.20% <100.00%> (-0.01%) ⬇️
minify-corpora 90.54% <ø> (ø)
syntax-equivalence 79.12% <ø> (ø)
test262 57.06% <100.00%> (+<0.01%) ⬆️
test262-parser 82.65% <ø> (ø)
unit 75.62% <90.90%> (+<0.01%) ⬆️

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Reported by Code Size #4551 for 3c71e8e, computed by this pull request's own code.

Generated code size

Comparing base (fa15f02) to head (3c71e8e). Merging this pull request changes the size of 79 asset(s) whose tests it leaves untouched.

What moved Tests Assets Gzip Raw Test edit
Changed, test untouched 37 79 🔴 ↑ +17 B — —
Changed, test edited 0 0 — — —
New 0 0 — — —
Deleted 0 0 — — —
Unchanged — 8530 — — —

Read Changed, test untouched first: the test is byte-identical on both sides, so webpack generated the difference. Changed, test edited moved partly because the test did — Test edit is how many bytes the test gained, and a bundle that grew by less is not a regression. New and Deleted are whole files, not deltas — a new asset was created, not grown, so it reads gray (⚪ added) — and adding tests cannot bury a real change. Gzip decides, because that is what users download; raw is the tiebreak, and brotli and zstd are per asset below.

79 asset(s) changed size, test untouched, biggest 20 by raw or gzip change
Asset Before After Change Gzip (9) Brotli (11) Zstd (19)
🔴 ↑ analyzable/asset-url-function-public-path 2/bundle2.mjs 4.29 KiB 4.29 KiB 0 B (—) +6 B (+0.40%) -1 B (-0.08%) +6 B (+0.40%)
🟢 ↓ analyzable/asset-url-relative-public-path 2/bundle2.mjs 8.26 KiB 8.26 KiB 0 B (—) -5 B (-0.20%) -4 B (-0.18%) -4 B (-0.16%)
🔴 ↑ analyzable/fullhash-public-path bundle0.[hash].mjs 7.01 KiB 7.01 KiB 0 B (—) +5 B (+0.23%) +2 B (+0.11%) -1 B (-0.05%)
🔴 ↑ hash-length/digest-async-chunk contenthash digest, realContentHash off/bundle0.js 945 B 945 B 0 B (—) +5 B (+0.90%) +1 B (+0.20%) +4 B (+0.72%)
🔴 ↑ hash-length/digest-static-chunk-url function chunkFilename, contenthash digest/bundle1.js 967 B 967 B 0 B (—) +5 B (+0.88%) +6 B (+1.18%) +4 B (+0.70%)
🔴 ↑ analyzable/asset-url-function-chunk-filename 1/bundle1.mjs 7.89 KiB 7.89 KiB 0 B (—) +4 B (+0.17%) -1 B (-0.05%) +3 B (+0.13%)
🟢 ↓ wasm/analyzable-templated-url-public-path 4/bundle4.mjs 11.90 KiB 11.90 KiB 0 B (—) -4 B (-0.12%) +5 B (+0.16%) -4 B (-0.12%)
🔴 ↑ analyzable/circular-chunk-hashes-repaired bundle0.mjs 8.89 KiB 8.89 KiB 0 B (—) +3 B (+0.11%) -2 B (-0.08%) —
🟢 ↓ analyzable/circular-chunkhash-names bundle0.mjs 7.54 KiB 7.54 KiB 0 B (—) -3 B (-0.13%) -7 B (-0.35%) -4 B (-0.17%)
🟢 ↓ analyzable/templated-public-path 1/bundle1.mjs 7.93 KiB 7.93 KiB 0 B (—) -3 B (-0.12%) +1 B (+0.05%) -3 B (-0.12%)
🔴 ↑ node/issue-18409 runtime.js 5.43 KiB 5.43 KiB 0 B (—) +3 B (+0.20%) -2 B (-0.15%) +2 B (+0.13%)
🔴 ↑ node/issue-18409-2 shared.js 5.91 KiB 5.91 KiB 0 B (—) +3 B (+0.18%) — +3 B (+0.18%)
🟢 ↓ parsing/extended-api bundle0.js 1.55 KiB 1.55 KiB 0 B (—) -3 B (-0.37%) -2 B (-0.28%) -4 B (-0.49%)
🟢 ↓ analyzable/chunk-hint-href hashed/hashed.mjs 12.25 KiB 12.25 KiB 0 B (—) -2 B (-0.06%) +1 B (+0.04%) -6 B (-0.19%)
🔴 ↑ analyzable/chunk-hint-href hmr/hmr.mjs 47.71 KiB 47.71 KiB 0 B (—) +2 B (+0.02%) +26 B (+0.31%) —
🔴 ↑ analyzable/chunkhash-name-follows-fill bundle0.[hash].mjs 7.48 KiB 7.48 KiB 0 B (—) +2 B (+0.09%) +3 B (+0.15%) +1 B (+0.04%)
🔴 ↑ analyzable/content-named-single-runtime runtime.[hash].mjs 5.63 KiB 5.63 KiB 0 B (—) +2 B (+0.13%) — +3 B (+0.20%)
🔴 ↑ analyzable/contenthash-without-repair bundle0.[hash].mjs 7.34 KiB 7.34 KiB 0 B (—) +2 B (+0.09%) +1 B (+0.05%) +2 B (+0.09%)
🔴 ↑ analyzable/dynamic-import-contenthash bundle0.mjs 7.50 KiB 7.50 KiB 0 B (—) +2 B (+0.09%) — +2 B (+0.09%)
🔴 ↑ analyzable/fullhash-public-path deep.[hash].mjs 560 B 560 B 0 B (—) +2 B (+0.64%) — +2 B (+0.63%)
… 59 more, see the uploaded report

No runtime gained or lost a runtime module.

Built test/configCases with the defaults a user gets: 2218 test(s), 8609 asset(s), 99 emitted nothing.

@codspeed

codspeed Bot commented Oct 12, 2026

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Merging this PR will degrade performance by 31.95%

⚠️ 108 benchmarks spent significant time in system calls

System calls cannot be consistently instrumented, so they are not included in the measure, which understates the real cost. Please switch to the Walltime instrument to accurately measure system calls.

Measurement and system calls

ℹ️ 28 benchmarks have no flame graph

The flamegraph could not be generated because too much time was spent in runtime internals, making the visualization not useful for performance analysis.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
❌ 2 regressed benchmarks
✅ 403 untouched benchmarks
⏩ 6 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Memory unit benchmark "js-parser-unit", tokenize typescript 35.8 KB 422.7 KB -91.54%
❌ Memory benchmark "asset-modules-source", scenario '{"name":"mode-development-rebuild","mode":"development","watch":true}' 191.5 KB 256.5 KB -25.32%
⚡ Memory unit benchmark "html-printer-document-unit", walk (document) 146.4 KB 29.4 KB ×5

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.


Comparing aryanraj45:fix/require-cycle-exports (3c71e8e) with main (fa15f02)

Open in CodSpeed

Footnotes

  1. 6 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

@alexander-akait
alexander-akait merged commit 8dd291c into webpack:main Oct 12, 2026
66 checks passed
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This PR is packaged and the instant preview is available (8dd291c).

Install it locally:

  • npm
npm i -D webpack@https://pkg.pr.new/webpack@8dd291c
  • yarn
yarn add -D webpack@https://pkg.pr.new/webpack@8dd291c
  • pnpm
pnpm add -D webpack@https://pkg.pr.new/webpack@8dd291c

markharding pushed a commit to futo-org/Harbor that referenced this pull request Oct 20, 2026
This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [webpack](https://github.com/webpack/webpack) | [`5.111.1` → `5.112.0`](https://renovatebot.com/diffs/npm/webpack/5.111.1/5.112.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/webpack/5.112.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/webpack/5.111.1/5.112.0?slim=true) |

---

> ⚠️ **Warning**
>
> Some dependencies could not be looked up. Check the [Dependency Dashboard](issues/99) for more information.

---

### Release Notes

<details>
<summary>webpack/webpack (webpack)</summary>

### [`v5.112.0`](https://github.com/webpack/webpack/blob/HEAD/CHANGELOG.md#51120)

[Compare Source](webpack/webpack@v5.111.1...v5.112.0)

##### Minor Changes

- Apply `plugins` set on a multi-configuration array to the `MultiCompiler`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22702](webpack/webpack#22702))

- Add `optimization.minimize.css.dropOverriddenDeclarations`, dropping a declaration a later one overrides where no target is named. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22175](webpack/webpack#22175))

- Export more plugins under their scope, move eleven loose exports under theirs, deprecate the old, and expose `template.DependencyTemplate`, `module.NullFactory` and `util.makeSerializable`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22261](webpack/webpack#22261))

- Let `util.makeSerializable` take several requests, current one first. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22340](webpack/webpack#22340))

- Emit the source map `scopes` field, so a debugger resolves imported ESM bindings by name. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;21999](webpack/webpack#21999))

- Add `library.entryExports: "all"` to expose the exports of every entry module. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22235](webpack/webpack#22235))

- Recognize a required `const` binding assigned to `exports` as a re-export. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22276](webpack/webpack#22276))

- Accept glob patterns in more path, module and file filter options. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22422](webpack/webpack#22422))

- Bundle a run of inline `<script>` tags into one chunk the page can inline. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22188](webpack/webpack#22188))

- Add `module.parser.javascript.topLevelThis` for classic-script `this` semantics. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22193](webpack/webpack#22193))

- Add `module.parser.html.chunkName` and a `webpackChunkName` comment for tags. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22200](webpack/webpack#22200))

- Add `include`/`exclude` version and request filters to shared modules. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22297](webpack/webpack#22297))

- Keep module side-effect information in ESM output as PURE annotations. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;21789](webpack/webpack#21789))

- Add `optimization.splitChunks.dedupDepth` to discover chunk intersections. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22240](webpack/webpack#22240))

- Add `optimization.minimizeOptions.json`, on by default with `futureDefaults`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22286](webpack/webpack#22286))

- Add `SSRManifestPlugin` and fix server-rendered CSS collection and adoption. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;21913](webpack/webpack#21913))

- Add an `ignore` hook to `output.copy` and keep unfollowed `from` symlinks. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22216](webpack/webpack#22216))

- Add `optimization.minimize.css.convertApproximateColors`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22157](webpack/webpack#22157))

- Add XML parsing and SVG/XML minification with data URLs and attribute sorting. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22269](webpack/webpack#22269))

- Extract CSS/HTML license comments like JS and safely shorten CSS gradients. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22408](webpack/webpack#22408))

- Resolve an async `DefinePlugin.runtimeValue` over an async `beforeParse` hook. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22210](webpack/webpack#22210))

- Add CSS `customMedia`/`customSelectors` minimize options; resolve chained names. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22360](webpack/webpack#22360))

- Rename the `Harmony*` names to `ESM*` and deprecate the old spellings. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22283](webpack/webpack#22283))

- Reduce `css.syntax`/`html.syntax` to `parser`, `printer`, `SourceProcessor` with one node path. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22233](webpack/webpack#22233))

- Add a JavaScript `SyntaxTree` read like the CSS one, and `toEstreeObject`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22608](webpack/webpack#22608))

- Fix minified code that threw, and add `pure_conversions` and `pure_heritage`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22473](webpack/webpack#22473))

- Shorten more CSS values and selectors, fold longhands, order declarations and gather layer blocks. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22442](webpack/webpack#22442))

- Add `optimization.minimize.css.charset`; `false` drops `@charset` for UTF-8 CSS. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22632](webpack/webpack#22632))

##### Patch Changes

- Join rules a gathered `@layer` leaves adjacent, and an at-rule with a later one (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22204](webpack/webpack#22204))
  stating the same condition; read what a condition declares.

- Read escaped CSS names and functions as spelled, and minify them unescaped. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22262](webpack/webpack#22262))

- Minify JavaScript, CSS and HTML assets whose names carry a `#fragment`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22277](webpack/webpack#22277))

- Require `minimizer-webpack-plugin` 5.12, so inline scripts in HTML minify again. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22296](webpack/webpack#22296))

- Minify the attributes of an HTML tag without rewriting the template in it. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22166](webpack/webpack#22166))

- Order joined at-rule selector lists and gather a repeated large `@layer` block. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22224](webpack/webpack#22224))

- Preserve case-sensitive template identifiers when minifying HTML tag attributes. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22177](webpack/webpack#22177))

- Match Acorn's strict directives, Unicode identifiers and expression validation. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22185](webpack/webpack#22185))

- Skip concatenating modules when `optimization.providedExports` is disabled. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22410](webpack/webpack#22410))

- Join rules a nesting lowering or duplicate drop left for a second pass. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22268](webpack/webpack#22268))

- Write U+00A0 in a minified HTML attribute as the character, not `&nbsp;`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22208](webpack/webpack#22208))

- Escape a foreign `<script>` or `<style>` body, which is character data. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22233](webpack/webpack#22233))

- Name the runtime module whose generation fails while hashing. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22203](webpack/webpack#22203))

- Rebuild a module in watch when its missing unused dependencies swap. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22693](webpack/webpack#22693))

- Rebuild in watch mode when a file is deleted while a build is running. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22650](webpack/webpack#22650))

- Take out the declaration a lowered shorthand writes over, which its source spelling made look like a fallback. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22270](webpack/webpack#22270))

- Read a foreign `<script>` or `<style>` body as character data, not as raw text. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22258](webpack/webpack#22258))

- Keep an inline `<style>` body as written when rebuilding a page webpack emitted. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22265](webpack/webpack#22265))

- Fix minified HTML for `style` spellings, CSS quotes, `<noscript>` and a BOM. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22370](webpack/webpack#22370))

- Record a build dependency required through a spread on Bun. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22230](webpack/webpack#22230))

- Write a nested selector opening on a combinator against its parent the way the printer writes one. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22271](webpack/webpack#22271))

- Fix missing async stylesheets with a shared runtime. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22659](webpack/webpack#22659))

- Support deferred imports introduced by hot updates. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22668](webpack/webpack#22668))

- Fix trailing commas in `require.resolve()` and `require.resolveWeak()` calls. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22658](webpack/webpack#22658))

- Keep regular expressions, functions and plugins distinct in resolver caches. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22667](webpack/webpack#22667))

- Order the list a lowered nested selector lands in on what is written, not on what was. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22287](webpack/webpack#22287))

- Hoist a vendor-prefixed nested rule for a target that reads no nesting. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22308](webpack/webpack#22308))

- Name a hoisted nested rule in the dark-scheme copy it writes. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22318](webpack/webpack#22318))

- Minify data: URL payloads in HTML attributes and `new URL`, and web manifests. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22300](webpack/webpack#22300))

- fold a fallback's colors over the author's arguments, and print with (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22314](webpack/webpack#22314))
  `recurseBlocks: false` rather than throwing

- Read a regular expression repeating a capture group name in linear time. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22187](webpack/webpack#22187))

- Make lazy barrels defer import declarations and keep no deferral across compilations. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22359](webpack/webpack#22359))

- Invalidate unaffected caches when connection activity or async status changes. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22431](webpack/webpack#22431))

- Order concatenated re-exports deterministically when their source order ties. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22697](webpack/webpack#22697))

- Regenerate a module's exports when a require() cycle forms or breaks around it. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22644](webpack/webpack#22644))

- Recompute re-exports, code and warnings when a module goes missing or returns. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22432](webpack/webpack#22432))

- Preserve loader resolution dependencies across cached rebuilds. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22430](webpack/webpack#22430))

- Read unwatched changes afresh and wait for restarted watch compilers to finish. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22646](webpack/webpack#22646))

- Parse loader output for `.wasm` as JavaScript when async wasm is auto-enabled. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22556](webpack/webpack#22556))

- Remove modules an async chunk inherits from a named parent chunk grown later. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22555](webpack/webpack#22555))

- Fix JavaScript minifier crashes, altered behavior, lost comments, unparsable output and null source map sources, including parameter aliases, ESTree trees and preserved names, and stop it writing into the caller's parse options. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22352](webpack/webpack#22352))

- Preserve the source phase of dynamic WebAssembly import contexts. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22604](webpack/webpack#22604))

- Await every async entry before resolving an ESM library import. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22617](webpack/webpack#22617))

- Keep unknown `import.meta` properties per module, alike for aliases and direct use. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22618](webpack/webpack#22618))

- Return WebAssembly modules directly from eager and weak source imports. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22606](webpack/webpack#22606))

- Handle missing ESM hot update manifests in Node.js without failing HMR checks. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22613](webpack/webpack#22613))

- Speed up JavaScript parsing: comment lookup, the tokenizer and the grammar. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22179](webpack/webpack#22179))

- Name a core module external by its key whichever spelling the code uses. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22565](webpack/webpack#22565))

- Prefix and drop 2009 flexbox names, keeping them where a box lays out by them. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22320](webpack/webpack#22320))

- Keep `initial` where Gecko or WebKit reads the property's keyword apart. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22176](webpack/webpack#22176))

- Fold `calc()` as lightningcss does, keeping it where a bare value is refused. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22205](webpack/webpack#22205))

- Keep a `color-mix()` whose hue rests on a gray's conversion residue. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22198](webpack/webpack#22198))

- Keep a shorthand's initial keyword where it parts two keywords of another slot. (by [@&#8203;dependabot](https://github.com/apps/dependabot) in [#&#8203;22518](webpack/webpack#22518))

- Group `lib/` and `lib/dependencies/` sources into directories. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22118](webpack/webpack#22118))

- Treat a browserslist target given at a bare major version (e.g. `safari 10`) as `<major>.0` when a feature's first supported version is a `[major, minor]` pair, so it is no longer reported as unsupported. (by [@&#8203;Eshiv-Pandey](https://github.com/Eshiv-Pandey) in [#&#8203;22280](webpack/webpack#22280))

- Keep the last HMR update with `output.clean`; stop rechecking removed files. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22339](webpack/webpack#22339))

- Read and print a CSS backslash as the spec does, and a NUL as U+FFFD. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22201](webpack/webpack#22201))

- Make minified CSS and HTML stable on a second pass, even for truncated input. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22290](webpack/webpack#22290))

- Minify a merged `<style>` run as one sheet, closing each where its input ended. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22302](webpack/webpack#22302))

- Minify JavaScript with webpack's printer under `futureDefaults`, `terser` otherwise. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22217](webpack/webpack#22217))

- Preserve `wrappedContextRegExp` flags when rebuilding context request matchers. (by [@&#8203;Eshiv-Pandey](https://github.com/Eshiv-Pandey) in [#&#8203;22303](webpack/webpack#22303))

- Minify CSS `@supports`, `@import` and `@custom-media` conditions, and exponent numbers. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22347](webpack/webpack#22347))

- Fold unitless `hsl()`/`hwb()` channels, and only where the separators are valid. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22242](webpack/webpack#22242))

- Split `@value` imports on the `from` keyword, not a substring in the path. (by [@&#8203;Eshiv-Pandey](https://github.com/Eshiv-Pandey) in [#&#8203;22306](webpack/webpack#22306))

- Destructure a dotted `DefinePlugin` key whose value is falsy or a runtimeValue. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22215](webpack/webpack#22215))

- Make `Stats.hasErrors()` read errors through the `processErrors` hook (via `getErrors()`), matching `hasWarnings()`, so a plugin that filters errors out of the hook is no longer contradicted by `hasErrors()`. (by [@&#8203;Eshiv-Pandey](https://github.com/Eshiv-Pandey) in [#&#8203;22281](webpack/webpack#22281))

- Allow wrapping an external concatenated module, now asked of the module itself, and re-exporting a JSON or asset `default` as a namespace object. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22226](webpack/webpack#22226))

- Match `urlHints` rules written with `and`, `or`, `not` and `glob` conditions; profile hook map taps, such as resolver and parser hooks, in `ProfilingPlugin`; report `import.meta` option errors inside `require.ensure` callbacks, not crash; and replace `any`, `object` and `Function` with precise types in the type definitions. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22681](webpack/webpack#22681))

- Reduce CSS and HTML build time and memory allocation. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22135](webpack/webpack#22135))

- Reuse free names instead of re-parsing modules for the entry IIFE rename. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22206](webpack/webpack#22206))

- Release each module's ast once scope-analysed, and encode each export path once. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22241](webpack/webpack#22241))

- Export a module library entry's default expression as its own binding, and keep (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22227](webpack/webpack#22227))
  the export helpers where the entry is not inlined.

- Give a wrapped concatenated body the same function header as a module factory. (by [@&#8203;hai-x](https://github.com/hai-x) in [#&#8203;22254](webpack/webpack#22254))

- Skip reading every asset when no content hash is named. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22256](webpack/webpack#22256))

- Cut graph, cached set, lazy barrel and ESM import memory and allocations. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22289](webpack/webpack#22289))

- Stop a module source from being held as both a string and a buffer. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22294](webpack/webpack#22294))

- Read the browserslist data and options schema only when a build needs them. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22324](webpack/webpack#22324))

- Release the eval devtool's cached module sources after wrapping them. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22358](webpack/webpack#22358))

- Release the rendered module sources after emitting the chunks. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22365](webpack/webpack#22365))

- Cut the peak memory and time of minifying through webpack's printer. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22368](webpack/webpack#22368))

- Shrink minified JS: unwrap IIFEs, fold calls, drop dead code, split arrays. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22393](webpack/webpack#22393))

- Cut JavaScript minifier time and memory; keep token positions in large inputs. (by [@&#8203;bjohansebas](https://github.com/bjohansebas) in [#&#8203;22329](webpack/webpack#22329))

- Keep the `calc()` around a `steps()` count `jump-none` would reject bare. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22168](webpack/webpack#22168))

- Split the CSS syntax module into a parser file and a printer file. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22222](webpack/webpack#22222))

- Update enhanced-resolve to 5.26.0. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22358](webpack/webpack#22358))

- Update watchpack to 2.6.1. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22670](webpack/webpack#22670))

- Split the HTML syntax module into a parser file and a printer file. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22223](webpack/webpack#22223))

- Rename classes in `lib/` so each says what it does and no two share a name. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22361](webpack/webpack#22361))

- Keep the remote fallback index aligned with registered container externals when an `internal ` external precedes a real one. (by [@&#8203;Eshiv-Pandey](https://github.com/Eshiv-Pandey) in [#&#8203;22362](webpack/webpack#22362))

- Stop a minified inlined chunk leaving a doubled `;` in its `<script>`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22370](webpack/webpack#22370))

- Stop `mergeDistantRules` mangling rules or reordering `all`, and merge more. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22370](webpack/webpack#22370))

- Minify by parsing with webpack's own parser rather than terser's. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22397](webpack/webpack#22397))

- Read JavaScript with webpack's parser alone when minifying, refusing early errors. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22397](webpack/webpack#22397))

- Parse an `assert(...)` call after an import with no semicolon, and a regular expression after `yield` in a generator method. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22406](webpack/webpack#22406))

- Keep the private names a direct `eval` reads when mangling. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22412](webpack/webpack#22412))

- Keep a class dropped for its effects where they read a private name it declares. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22421](webpack/webpack#22421))

- Parenthesize the right side of a private `in`, a `yield`, `await`, private `in` or optional chain tagging a template, and a `let` or `async` starting a statement or loop head, where the minifier printed code that no longer parsed or read otherwise. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22437](webpack/webpack#22437))

- Keep a name a parameter list or catch parameter reads from resolving to what the function body or catch block declares, which the minifier renamed or dropped as unused. (by [@&#8203;aryanraj45](https://github.com/aryanraj45) in [#&#8203;22439](webpack/webpack#22439))

- Scope and export a CSS Modules `@value` the same way whether local or imported. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22443](webpack/webpack#22443))

- Keep CSS `border: none` and gradient fallbacks for units a target cannot read. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22567](webpack/webpack#22567))

- Keep minified CSS safe for older browsers; drop dead fallbacks and overrides. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22696](webpack/webpack#22696))

- Keep CSS rules apart from a neighbor whose selector no browser parses. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22634](webpack/webpack#22634))

- Keep an `:nth-*()` argument with a space after its sign as written. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22700](webpack/webpack#22700))

- Keep minified CSS readable by browsers the compat data does not cover. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22701](webpack/webpack#22701))

- Keep a module its chunk still needs after `compilation.rebuildModule()`. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22705](webpack/webpack#22705))

- Keep a CSS rule nested under a selector opening on a combinator when lowering. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22707](webpack/webpack#22707))

- Use module paths for webpack's built-in minimizers so parallel minification can load them directly in workers instead of serializing their function sources. (by [@&#8203;xiaoxiaojx](https://github.com/xiaoxiaojx) in [#&#8203;22309](webpack/webpack#22309))

- Keep stats from an earlier build readable after a later build no longer has one of their modules. (by [@&#8203;alexander-akait](https://github.com/alexander-akait) in [#&#8203;22695](webpack/webpack#22695))

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- Branch creation
  - "before 9am on tuesday"
- Automerge
  - At any time (no schedule defined)

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Mend Renovate CLI](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0NC4xNjcuMCIsInVwZGF0ZWRJblZlciI6IjQ0LjE2Ny4wIiwidGFyZ2V0QnJhbmNoIjoiZGV2ZWxvcCIsImxhYmVscyI6WyJkZXBlbmRlbmNpZXMiLCJyZW5vdmF0ZSJdfQ==-->

Reviewed-on: https://code.futo.org/harbor/harbor/pulls/1941
Reviewed-by: Mark Harding <mark@futo.org>
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